Fresh-air-intake device for heating systems.



0. H. SMITH & M. I. WBIDBNBAOH.

FRESH AIR INTAKE nnvmn r011 HEATING SYSTEMS.

Patented June 29, 1909.

2 SHEETS-SHEET 1.

APPLICATION EILED APR. 6, 1909.

V G. E. SMITH & M. F. WEIDENBAOH. FRESH AIR INTAKE DEVICE FOR HEATING SYSTEMS APPLICATION FILED APR. 5. 1909.

926,21 7. Patented June 29, 1909.

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UNITED SAES ATENT OFFICE.

CHARLES H. SMITH AND MICHAEL F. WEIDENBACII, OF MINNEAPOLIS, MINNESOTA; SAID WEIDENBACH ASSIGNOR TO MANUEL-SMITH HEATING COMPANY, OF MINNEAPOLIS, MIN- NESOTA, A CORPORATION OF MINNESOTA.

FRESH-AIR-INTAKE DEVICE FOR HEATING SYSTEMS.

Specification of Letters Patent.

Application filed April 5, 1909.

Patented June 29, 1909.

Serial No. 487,868.

To all whom it may concern:

Be it known that we, CHARLES H. SMITH and MIeHAEL F. WEIDENBAOH, citizens of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Fresh-Air-Intake Devices for Heating Systems; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates particularly to heating and ventilating systems of that type wherein an open ended jacket surrounds a stove or furnace, and has for its especial object to provide an improved fresh air intake device therefor.

To the above ends, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings: Figure 1 is a fragmentary view in vertical section, showing our invention applied to a heating apparatus of the character above indicated, some parts being shown in full and some parts being broken away; Fig. 2 is a horizontal section taken approximately on the line 11' of Fig. 1, showing the so-called damper plate in a lowered position; and Fig. 3 is a horizontal section taken on the line a of Fig. 1, showing the damper plate in its upturned position.

The heater which may be assumed to be either a stove or a furnace, is indicated by the numeral 1, and as shown, it is provided with an approximately cylindrical body. The open ended jacket which surrounds the heater is indicated by the numeral 2. The cold air intake pipe 3 which leads from the exterior of the room or building in which the heating apparatus is installed, connects to one side of the lower portion of the jacket 2. Preferably this intake pipe 3 is of tubular form, and terminates in the vicinity of the jacket in a rectangular box-like portion, having laterally spaced side plates 5 that extend inward, to the lower portion of the body of the stove or heater 1. At their lower edges, these side plates 5 are formed with inturned stop flanges 6. A damper plate 7 is connected by a hinge rod 8 to the lower portion of the box 4 at a point close to the junction of said box with the jacket 2. This damper plate 7, at its free edge, is cut on a curved line so that when turned downward onto the stop flanges 6, as shown in Figs. 1 and 2, it will closely engage with the cylindrical body of the heater 1. In transverse section, said damper plate 7 is curved, so that when turned upward, as shown by dotted lines in Fig. 1, it will closely engage the curved edge formed by the junction of the top plate of the box 4 with the jacket 2. On its top, said damper plate 7 is shown as provided with a lug 9, that is connected by a link 10 to the lower end of an operating lever 11 that is extended upward through a suitable slot in the top of the box 4-, and is intermediately pivoted to a small bearing lug or bracket 12 secured on said box. The upper end of the lever 11 is shown as bent in the form of a loop to afford a suitable finger piece.

As is evident, by manipulation of the lever 11, the damper plate 7 may be moved from the downturned position shown by full lines, into its upturned position shown by dotted lines in Fig. 1, and vice versa. Vfhen the said damper plate is turned down, as noted, it completely closes the bottom of the fresh air intake box, and opens wide the fresh air intake passage. When thesaid damper plate is turned into its uppermost position, it closes the fresh air intake passage but opens the bottom of that portion of the fresh air intake box, which is between the side plates 5, and hence, at such time, offers no obstruction whatever to the upward circulation of air between the stove and jacket. When the damper plate is set in an intermediate position, it will open up more or less the fresh air intake passage, and will also open up to an inverse extent, the passage at the bottom of the box. Home, as is evident, the said damper plate, in all positions, affords an opening through the fresh air intake box which is equal to the full conductive capacity thereof, but as stated, the air circulating through the box may be entirely fresh air, 01' entirely air from the room, or in part fresh air, and in part air from the room. This arrangement of the damper is highly important, and furthermore, the peculiar form of the damper plate described, which enables it to quite tightly close both against the base of the heater and against the junction of the top of the fresh air intake box and jacket, permits of extremely simple and eflicient construction, and is important.

VJ hat we claim is:

1. The combination with a heater and a surrounding jacket, which latter is open both at top and bottom, of a fresh air intake pipe terminating in a fresh air intake box located in the space between said heater and surrounding jacket, and a movable bottom plate adapted in one position to close the bottom of said intake box and adapted in another position to open up a direct air circulating passage through said box from the bottom of said jacket.

2. The combination with an approximately cylindrical heater and an approximately cylindrical surrounding jacket that is open at top and bottom, of a fresh air intake pipe terminating in a fresh air intake box located in the space between said heater and jacket, and a pivoted bottom plate or damper adapted in one position to close the bottom of said air intake box and open up said fresh air intake pipe, and adapted in another position to open the bottom of said intake box and close said fresh air intake pipe.

3. The combination with an approximately cylindrical heater and an approximately 03 lindrical surrounding jacket that is open at top and bottom, of a fresh air intake pipe opening through one side of said jacket, and

provided With laterally spaced side plates extending from said jacket to said heater, and afiording a fresh air intake box that is open at top and bottom, a damper pivoted Within said box, said damper being curved in cross section to fit the curve at the junction of said fresh air intake pipe and jacket, and having its free edge'curved to fit the adjacent surface of said cylindrical heater, substantially as described.

In testimony whereof We affix our signatures in presence of two Witnesses.

CHARLES H. SMITH. MICHAEL F. i VEIDENBACH.

Witnesses ALIon J. SWANSON, HARRY D. KILGORE. 

